Motor starting device



Filed June 12, 1935 Fig? Bi/W [9 T Toe/v15 Y6 E Patented Nev. 16, 1937 UNITED STATES PATENT OFFICE MOTOR STARTING DEVICE Pierre Cibi, Paris, France Application June 12, 1935, Serial No. 26,196 In France June 19, 1934 1 Claim.

This invention relates to improvements in and relating to motor starting devices. It is especially concerned with the devices of that type in which the resilient member is of a generally 5 oblique shape and is composed of a plurality of parts having different inclinations, whereby a suitable guide for the said member is provided.

Said improvements relate also to a particular arrangement of the resilient member according to which the latter is constituted by a spring rod which is secured upon the movable system and is guided in a groove provided in the arm of a plate which is fixed upon the shaft of the starting engine.

The present improvements are further concerned with a modification of the spring rod in which the latter constitutes a spring coil which is secured at one end upon a part integral with the shaft of the starting engine and is guided at 9 its other end in a groove provided in a cage integral with the driving pinion;

In the drawing:

Fig. 1 is a front view showing a form of execution of my improved device.

25 Fig. 2 is a similar view of execution.

Fig. 3 is a side view showing partly in longitudinal section and partly in elevation a form of execution which comprises the use of a spring 30 coil; Fig. 4 is a transverse sectional view of same.

Figs. 5 and 6 are two similar views of a modification which comprises the use of a spring rod.

In the device illustrated in Fig. 1, the driving another mode of pinion l2 which is designed to mesh with the teeth (not shown) provided upon the flywheel of the motor to be started is loosely mounted upon the shaft l3 and is integral with a plate ll carrying two spurs I 4 between which the spring I5 is guided. The latter which constitutes a spring rod is arranged obliquely and comprises two parts having different inclinations and is connected at one end with a plate I5 keyed upon the shaft of the starting engine. It will be understood that when said starting engine drives the shaft I3 and the plate IS the spurs will slide along the spring I5 and thus will draw along the pinion I 2 which owing to the oblique shape of the spring l5 moves forward so as to .engagethe toothed crown of the flywheel carried upon the motor to be started.

Owing to the double inclined plane of the spring the forward movement of the pinion will at first be slow which will prevent a shock upon the flywheel teeth and will afterwards be quick so as to insure the engagement resulting in the starting of the motor. The necessary movement of the driving pinion will thus be produced by a very small angle of rotation of the starting motor.

Fig. 2 illustrates another form of execution in which a spring rod l1, secured upon the plate II is employed. The outer end of said spring engages a groove I8 provided in an arm l9 integral with plate l6. In this case said groove H! has a somewhat different shape from that of the spring shown in Fig. 1 the two oblique parts being made in one.

In the modification the spring forms a spring coil 20 which is secured upon a ring 2| fixed upon the shaft I3; its outer end 2i] engaging an oblique groove 22 provided in a cage 23 integral with the pinion l2.

In the modification shown in Figs. 5 and 6,

the parts l2 and 23 are the same as in the above case with the exception that the spring coil is replaced by a spring rod 24 which is fixed upon a plate 25 and engages the groove 22 of cage 23.

Because of the oblique arrangement and inclined surface of the spring or of its guiding groove in these various modifications a smooth engagement of the pinion with the flywheel teeth will be ensured and positive driving of the.

flywheel will result from a very small angle of rotation of the starting engine.

What I claim and desire to secure by Letters Patent of the United States is:

A motor starting device which comprises: a

shaft driven by the starting engine, a plate integral with said shaft, a driving pinion loosely mounted upon said shaft and integral with a second plate, a spring rod fixed at one end to the plate of the shaft of the starting engine and an inclined surface having a straight portion and an inclined portion provided. in said second plate integral with the driving pinion and in which the opposite end of the spring rod slides.

PIERRE CIBIE.

shown in Figs. 3 and. 4, f 

